Geodesic
An eigenfunction manifold generated by a family of periodic boundary value problems
Sbornik. Mathematics, Tome 212 (2021) no. 9, pp. 1208-1227 Cet article a éte moissonné depuis la source Math-Net.Ru

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An analytic and topological description is given of the manifold of periodic eigenfunctions generated by the space of one-dimensional stationary Schrödinger equations with periodic real potentials. Connections with results due to Neuman, Ince and Uhlenbeck are discussed. Bibliography: 11 titles.
Keywords: space of periodic boundary-value problems, fibration of the eigenfunction manifold. 
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Ya. M. Dymarskii; A. A. Bondar'. An eigenfunction manifold generated by a family of periodic boundary value problems. Sbornik. Mathematics, Tome 212 (2021) no. 9, pp. 1208-1227. http://geodesic.mathdoc.fr/item/SM_2021_212_9_a1/

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